Once upon a time there was a girl named sarah who had a big test the next day. She was so lazy and she was playing with her dog pochi. Her mother said, "Are you sure that you know the test material?" "Yes, mom. I know it." And she played and played and played until it was time for the big test. She had lots of minutes. But the next day came and with it came the big test. Sarah got a bad mark. 
Study everything before you play. 